I purchased a Griffin iTrip Clip. At $20, it's kind of hard to go wrong (not impossible to do so), but at least it isn't spendy.
https://griffintechnology.com/us/itrip-clip-bluetooth-headphone-adapter
The physical device is small and light. The keypad is about the diameter of a quarter (to give you an idea of the actual size), and the clip seems like it would happily go on a pocket or other garment hem. It charges up quickly. It includes a very short USB to microUSB charging cable, but you could use any of them you have lying around. There is an LED in the play/pause button to let you know charge status and the body of the thing has a slightly grippy texture- not quite rubberized, but similar.
Claimed battery life is 6 hours. I have not tested this. Nor have I tested how it works for phone calls (it has a built in mic so it will function as a hands free rig even with normal headphones).
When you power it on or off with headphones connected, you hear an audible female voice saying "power on/off" so it's easy to tell if you actually turned it on/off. Pairing was simple, but the included manual neglects telling you how to start it. Rather than turn it on and THEN holding the button for 7 seconds to enter pairing mode, you just hold the button down when off... it will turn it on and kick it into pairing mode. Still, my iPhone 7 picked it up fast and paired right up.
The buttons work find. Play plays/pauses, the volume controls do indeed control volume, etc.
But what really matters is the sound, right?
I used a 320kbps MP3 I ripped myself and ported over to the iPhone. The headphones used were my Sennheiser HD580s. I went back and forth from the Griffin to the included iPhone lightning to 1/8" dongle.
I could tell no difference in the audio. It sounded just as good both ways. Nice and clear.
My recommendation: Buy. If you want to use standard headphones with a bluetooth equipped device that either ditched the headphone jack or you just want to break that wired connection for whatever reason. It's a good device.
https://griffintechnology.com/us/itrip-clip-bluetooth-headphone-adapter
The physical device is small and light. The keypad is about the diameter of a quarter (to give you an idea of the actual size), and the clip seems like it would happily go on a pocket or other garment hem. It charges up quickly. It includes a very short USB to microUSB charging cable, but you could use any of them you have lying around. There is an LED in the play/pause button to let you know charge status and the body of the thing has a slightly grippy texture- not quite rubberized, but similar.
Claimed battery life is 6 hours. I have not tested this. Nor have I tested how it works for phone calls (it has a built in mic so it will function as a hands free rig even with normal headphones).
When you power it on or off with headphones connected, you hear an audible female voice saying "power on/off" so it's easy to tell if you actually turned it on/off. Pairing was simple, but the included manual neglects telling you how to start it. Rather than turn it on and THEN holding the button for 7 seconds to enter pairing mode, you just hold the button down when off... it will turn it on and kick it into pairing mode. Still, my iPhone 7 picked it up fast and paired right up.
The buttons work find. Play plays/pauses, the volume controls do indeed control volume, etc.
But what really matters is the sound, right?
I used a 320kbps MP3 I ripped myself and ported over to the iPhone. The headphones used were my Sennheiser HD580s. I went back and forth from the Griffin to the included iPhone lightning to 1/8" dongle.
I could tell no difference in the audio. It sounded just as good both ways. Nice and clear.
My recommendation: Buy. If you want to use standard headphones with a bluetooth equipped device that either ditched the headphone jack or you just want to break that wired connection for whatever reason. It's a good device.